95823-42-0 Poly(oxy(methyl-1,2-ethanediyl)), alpha-(2-(5-carboxy-1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methylethyl)-omega-(2-(5-carboxy-1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methylethoxy)-